Sheet registering mechanism



EX ross Reference miner 2 266 7 5 9 w. F. HUCK 2,266,759

SHEET REGISTERING MECHANISM Filed June 8, 1940 4 Sheets-Sheet 1 m u m aT N N Wm m W N n M -a A e |lll|||l||||||.l||IllllllllllllllllllllF||1|II| llllllll 3 $2 9 3 ,M 5 l 4 s 4 2 22 6 2 G: I 2 8 Q m e 8 e Dec.23, 1941.

Cmss Reference W. F. HUCK SHEET REGISTERING MECHANISM Filed June 8, 194015G :58 me I I9 /4-8 4| I44 I 42,' 7

/ 22 I35 \Mdw 73 J4 e n L )Q Examiner 4 Sheets-Sheet 2 i8 4 Q so 94 is?INVENTOR W; lliamEHuc/r.

ATTNEY uross Reference Examine,

w. F. HUCK 2,266,759

Dec. 23, 1941.

SHEET REGISTERING MECHANISM Filed June 8,1940 4 Sheets-Sheet 3 INVENTORWuuam EHuc/r.

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25o 22l J has Patented Dec. 23, 1941 UNITED. STATES PATENT OFFICE SHEETREGISTERING MECHANISM William F. Huck, Richmond Hill, N. Y., assignor toB. Hoe & Cos Inc., New York, N. Y., a corporation of New YorkApplication June 8, 1940, Serial No. 339,440

24 Claims.

This invention relates to sheet registering mechanism and moreparticularly to a mechanism for registering an impression printed on asheet, with respect to components of a -machine adapted to trim thesheet, perforate it, or perform any operation that must register withthe impression.

In sheet trimming machines of the type used for trimming printed sheetsof bank notes, and in sheet perforating machines of the type used forperforating printed sheets of postage stamps, it is particularlydesirable that the trimmed edges, and rows of perforations be in:register with the impressions printed on the sheets. To obtain thisdesideratum, it is contemplated as one object of this invention, toprovide an improved sheet registering mechanism.

Another object of this invention is to provide in a machine having meansto operate upon a printed sheet, means to move the sheet to meister theprinted impressions with rmpect to the operating means, and then to holdthe sheet in such position during the subsequent operation.

A further object :of this invention .is to provide in a machine havingmeans for operating upon a printed sheet, means to move the printedsheet in any direction in the same plane to meister the printedimpressions thereon with the means for operating on the sheet, such asthe trimming or perforating means, and means to hold the sheet duringthe registering and machine operations.

A still further object of this vinveizrticm is to provide in a printedsheet registering mechanism photo-electric means adapted to be actuatedby the printed impressions on the sheet to control the operations of thesaid registering mechanism.

it is also an object of this invention to ,provide a sheet registeringmechanism of generally improved construction, whereby the device will besimple, durable and inexpensive in construction, as well as convenient,practical, serviceable and eflicientin its use.

With the foregoing and ether ntiiects in view,

Figure 1A is a schematic side view of the sheet trimming means shown inFigure 1;

Figure 2 illustrates a printed sheet, such as a sheet of bank notes, theedges of which the machine shown in Figure l is adapted to trim inaccurate register with the printed impressions;

Figure 3 shows a top plan view of one form of mechanism for registeringa printed sheet which includes a sheet holding plate, herein shown indotted lines for the sake of clearness and means for moving it asrequired to effect registration;

Figure 4 is a cross sectional view of the sheet holding plate, and anend view of the sheet registering mechanism, shown in Figure 3, inoperative association with the sheet holding plate;

Figure 5 is an enlarged cross sectional view taken on the line 5-5 ofFigure 3 and showing an end view of a brake device adapted for use withthis mechanism Figure 6 is a schematic layout of the cams used in thesheet trimming machine illustrated in Figure 1 for timing the variousoperations thereof;

Figure 7 is a schematic electrical diagram showing the photo-electriccontrol mechanism of the invention as disclosed in Figures 3 and 4;

Figure 8 is a vertical cross sectional .view of another form of sheetregistering mechanism;

Figure 8A is a schematic Side View of a somewhat modified form of sheettrimming means;

Figure 9 is a top plan view of the mechanism shown in Figure 8 lookingin the direction of the arrows 9--9 in that figure and indicating thesheet holding plate in dotted lines;

Figure 10 is a sectional view of the mechanism shown in Figure .8 takenbelow the sheet holding plate supporting frame and showing the motordriven shafts and earns for effecting movements of thesheet holdingplate;

Figure 11 is a schematic electrical diagram showing the photo-electricalcontrol mechanism 20f the invention as disclosed in Figures B, 9 and 10;

Figure 12 illustrates a printed sheet, such as a sheet-of postage stampswhich requires r istering of the printed impressions thereon withrespect to the perforating mechanism before being perforated;

figure 13 is a schematic layout of a sheet perforating machine adaptedto perforate the .P inted sheet shown in Figure 12 and to which :eitherof the sheet registering mechanisms of this invention may be applied;and

Figure 14 is a schematic layout of a somewhat modified arrangement for:moving a sheet holding plate, wherein individual electric motors areused instead of the clutches shown in Figure 3.

Referring now to the drawings and particularly to Figures 1-7 inclusivewherein one form of the invention is illustrated, the trimming machineillustrated schematically in Figure l includes means such as cooperatingpairs of rollers H, I2 and I3, |4, rollers I2 and I4 being driven onesto feed printed sheets I5 from a pile I6 thereof toward a plate I1disposed within a rectangular sheet trimming frame I8 supported on abase and having upwardly facing knife edges I9 around its upperperipheral edge. Four driven rollers 2| and 23 (shown on Figure 1), and22 and 24 (shown on Figure 4), extend through slots 25 in the plate I1to engage a sheet I5 thereon to feed it along over the plate against amovable stop member 26, whereby the sheet I5 is initially located withrespect to the knife edges I9. running roller 21 and a driven roller 28are adapted to engage the sheet I5, after it is trimmed and fed along bythe rollers 2I--24 inclusive, to feed it to a carrier device 29wherefrom the sheet is delivered to a pile 3|.

The knife edges I9 cooperate with corresponding knife edges 32 carriedby a cam operated swinging frame 33 to trim the edges of the sheet I5 asit is held upon the plate I1. Four rollers 34 carried by a cam operatedswinging open frame 35 cooperate with the driven rollers 2I-24 inclusiveto feed the trimmed sheets I5 upon and from the plate I1. Cams 36, 31and 38 (shown schematically in Figure 6) are secured to a shaft 40rotatably supported in the frame 20, and driven in timed relation withthe sheet feeding rollers I2, I4, 2 I-24 inclusive and 28 from themachine drive. The shaft 40 is rotated once for each complete cycle ofoperation of the machine, the several cams operating in sequence. Thecam 36 raises the stop member 26 into position to locate a sheet I5being fed over the plate I1, the cam 31 then lowers the frame 35 toengage the rollers 34 with the rollers 2 |-24 inclusive, the cam 38 thenlowers and raises the knife carrying frame 33 to trim the edges of asheet by the cooperating action of the knives I9 and 32, the cam 36 thenlowers the stop member 26, and the cam 31 raises the frame 35, while theframe 33 is raised. The frames 33 and 35, as herein shown, are pivotallysupported by a shaft 39, but may obviously be arranged in any othersuitable manner.

The plate I1 (see Figure 4) is hollow and has a plurality ofperforations 4| in its upper wall by means of which a suction pump (notshown), but which is connected to the plate I1 through a cam actuatedvalve 42 (Figure 6) and a tube 43, will act to hold a sheet I5 upon theupper surface of the plate I1. The valve 42 is arranged to be opened bya cam 44 as soon as a sheet I5 has been disposed on the plate I1 by therollers 2I-24 inclusive and 34. The plate I1 is movably supported formovement in any direction in a horizontal plane, on balls 40 carried inboxes 56 mounted upon the frame I8 and positioned under each corner ofthe plate I1. Posts 45, 46, 41 (Figure 3) having cylindrical ends 48which extend upwardly into the plate I1, to permit pivotal movementbetween the respective posts and the plate I1, also extend downwardlyfrom the plate I1 (as shown in Figure 4) to be engaged by screw threadedrods 49, 5| and 52 respectively.

The threaded rods 49, 5| and 52 are screw Beyond the stop member 26 afree threaded into and through the posts 45, 46 and 41 respectively, andupon being rotated, will effect a swinging movement of the plate I1. Theaxes of the rods 49 and 5| are subtsantially parallel while the axis ofthe rod 52 is perpendicular to the axes of the rods 49 and 5|. Byselection of the rod or rods 49, 5| or 52 to be rotated, and of thedirection of rotation thereof, the plate I1 may be moved in anydirection in a horizontal plane to effect registration of a sheet I5held by suction to the plate I1 with the trimming knives I9 and 32.

Instead of using the clutch operating solenoids 83, 84, 89, 9I and H9,I2l, as shown in Figure 7 and described hereinafter, the rods 49, 5| and52 may be rotated in either direction by separate reversible motors,under control of a means to detect faulty register of the printedimpressions, the detecting means being arranged to actuate suitableelectrical devices for reversing the motors. Such an arrangement isdiagrammatically shown in Figure 14 and will be hereinafter described.

The rods 49, 5| and 52 are each herein shown connected by universaljoints 53 to one end of shafts 54, 55 and 56 respectively. The shafts 54and 55 are arranged to be rotated in supports fixed to the base 20 bymeans which includes a bevel gear 51 secured on the other ends of theshafts 54 and 55. The bevel gear 51 is in mesh with opposing bevel gears58 and 59 mounted for free rotation on a shaft 6| driven by a motor 62through a worm-wheel 63 secured on the shaft 6| and a worm 64 secured onthe motor shaft 65.

Clutch members 66 and 61 are formed integral with, or secured to, thebevel gears 58 and 59 respectively and are disposed in opposed spacedapart relation on the shaft 6| to be selectively engaged by oppositelydirected clutch portions 68 and 69 of a sleeve 1| axially slidable onthe shaft 6| while being secured thereto by a key 12 on which theyslide. A clutch sleeve shifting fork 13, car y g rollers 14 adapted toride in an annular groove 15 formed in the sleeve 1|, is pivoted at 16to a stationary post 11. The sleeve shifting fork 13 controlling therotation of the shaft 54, has a portion 18 extending beyond its pivot 16into connection at 19, with slidable plungers 8| and 82 of a pair ofopposed electrical solenoids 83 and 84 respectively. The fork 13controlling the rotation of the shaft 55 has a portion 85 extendingbeyond its pivot 16 into connection at 86 with slidable plungers 81 and88 of solenoids 89 and 9|. A tongue 92, extended beyond the extendingportions 18 and 85, is engaged by the ends of opposed rods 93 and 94pressed thereagainst by springs 95 and 96 respectively, to normally holdthe clutch shifting forks 13 in a central position, whereby the clutchportions 68 and 69 of the sleeve 1| will be normally held in a neutralposition and out of engagement with the clutch members 66 and 61respectively.

The shaft56 is adapted to be rotated in supports fixed to the base 26and in either direction, by having spur gears 91 and 98 secured thereonwhich are in mesh respectively with a spur gear 99 and an idler gearIIJI, the idler gear |0| being in mesh with a spur gear I82. The spurgears 99 and I02 are mounted for free rotation upon the shaft 6| andhave clutch members I03 and I84 respectively formed integral therewith,which are disposed in opposed spaced apart relatlon on the shaft 6| tobe selectively engaged by oppositely directed clutch portions I05 and'thereagainst by springs I25 and I26 respectively,

"to normally hold the clutch shifting forks I09 \JI Ubb HUIUIUHUUinneutral position and the clutch portions and '5 members normallydisengaged.

From "the above, it will be understood that energiz'ation of either ofthe solenoids '83 or 84 will connect the threaded rod 49 to the drivenshaft 6| thrQughthe clutch portions 68 or 69 and members "66 or 61.Rotation of the rod 49 -'will tend to shift one side of the plate I1generally forward or backward with respect to the direction of the feedof the sheet I5 and about the pivot'48 at the post 46. Likewise, theenergization of either of the solenoids 89 or 9| will cause rotation ofthe rod 5| and tend to shift the opposite side of the plate I1 generallyabout the pivot '48 at the post 45. Rotation of the rod "52 byenergization of the solenoid H9 or I2I *3 will tend to shift the plateI1 generally transversely to the direction of the feed of the sheet I5."It will also be seen that simultaneous rotation of 'the rods 49 and 5Iin the same direction will 'move the plate I1 either forward or back-"w'a'rd in the line of its travel, and if they are simultaneously movedin opposite directions the plate will be swung about the pivot 48 at the-post 41. Thus, selective energization of the solenoids'83, 84. 89, 9|,H8, I2I, under the control of means affected by the position of aprinted impression on a printed sheet, will cause the rotation of therods 49, 5| or 52 to shift the plate I1 in any direction in a horizontalplane to effect the proper register of the printed impressions on thesheet I5 with the knife edges I9 and 32 *to insure the proper operationthereof to trim the sheet in're'g'ister with the printing.

In order to insure that the registering move- -ments of the rods 49, 5|and 52 will not overrun beyond the desired amount, brake mechanisms areprovided to act upon each of the shafts 54, 55 and 56 when the clutchsleeve shifting forks are in neutral position. This brake mechanismincludes an arm I21 (Figures 4 and 5), 'one end of which ispivotally-connected to and extends from each of the forks to astationary post I28 to which its other end is pivoted. A cam member I29is carried by the end of the *arm l21 at the post I28 and is adaptedtoact uponthe lowerends of a pair of opposed swingable arms l3'I and I32to spread them apart and thus release brake shoes I33 and I34 from en-"g'a'gem'ent with the respective shaft 54. 55 and '66 with which theyare associated. The arms 1 31 and I32 are pivoted together at theiruppe'r ends and to a stationary bracket I35. Oppositely 'actin'g springsI 36 and I31 acting on the arms I3I and I32, tend to normally maintainthe brake shoes in braking engagement with the respective shaft 'withwhich they are associated.

The means disclosed herein for automatically and selectively energizingthe solenoids 83, 84, 89, 9|, I I9 and l2-I includes three pairs ofphotoelectric cells I38--'l3 9,

erasure 2 3 and a 'so'iirce of light for each pair as: cells such aslamps I45, I46 and I41 respectively. Each pair of cells with itsassociated light source is disposedto be effected in this instance bythe printed impressions on the irinted sh'e et 15 The three pairs ofphoto-electfic *cell's B -V33, HI'I42, and [43-444 and the lamps I45 6,and 141 may be mounted in any convenient manner, such as on a stationary's'upport 'egr tending from the rear frame of the machine, to a locationwithin the open frame 35 which supports the rollers 34, clearance beingprovided to permit the small vertical motion of the frame that occursduring operation. As an illustration, the photo-cells are directed atthe adjacent "edges of printed impressions, such as those on asheetof'bank'notes, one pair I38, I39 being disposed adjacent the top ofthe sheet and affected by vertical edges, one pair I4I, I42 beingdisposed adjacent the bottom of the sheet and affected by verticaledges, and the other pair, I43, I44, being disposed adjacent the centerof the sheet and affected by horizontal edges. Each of the photo-cellscontrols one of the solen'oids through polarized relays I48, I49, andI5I (Eigure 7), one relay for each pair of cells.

The arrangement is such that each pair of cells is connected into thecircuit of the respectivepo'lariz'e'd relay by switches I52, I53 andI54. These ,sw'lt'clie's are simultaneously closed by a cam J55rotatedin timed relation with the cams 36, 31 and :38 (Figure 6), "sothat the cells will be placed inoperative condition after a sheet "I5has been Initially disposed on the plate I1 and held there-against bysuction, and before the knife carrying frame is lowered to trim thesheet. Referring particularly to Figure '7, the electrical circuitarrangement schematically shown thereinjinclude's line wires LI and L2.The light sources I45, I46, and I41 are respectively connected betweenthe line wire LI and L2 by conductors '156 and I61. One terminal of eachcell of each'pair is connected by a conductor I58 to its associatedrelay I48, I49 or I5I, and the other terminal of'each cell of each pairis connected by In condiictor I59 to the associated switch 152, I53 orI54. Each of the switches I52, 153 or 154 is connected by a conductorISI -to' the respective relay I48, I49 or I5I. The relay 1481s arrangedto close normally open switches I62 and 163, one terminal of each ofwhich is connected to the other and to the line wire Ll 'by aco'n'ductorI64. The other terminal of the switch I62 is connected by a conductor165 to the solenoid 83, and the other terminal of the switch I63 isconnected by a conductor [66 tothe solenoidi l. The solenoids 83 and 84are commonly connected to the line wir L2 by a conductor I61,

Thea-clay 1491's arranged to close normally switches 168 and I69, oneterminal of each of which is connected to the other and to the line wireLl byaconductor I1 I. The other terminal pr the switch I68 i's'connected by a conductor I12 to th'e solenoid 89 and the other terminal ofthe switch 189 is connected by a conductor I 13 to the solenoid 8I.Thesolenoids '89 and SI are commonly connected "to the line wire L2 by aconductor I14. The relay 'I5I is arranged to close normally openswitches I15 and I16, one terminal 'of each of 'which'is connected tothe other and to the line wire LI by a conductor I11. The otherterminal'of the -switch I15 is connected by a conductor [18 tothe'solenoid H9 and the other ter- 4| l2 n @414 initial or the switchI16 is connected by a con- Examiner ductor I19 to the solenoid I2I. Thesolenoids II9 and I2I are commonly connected to the line wire L2 by aconductor I8I.

Briefly the operation of the above described sheet trimming machine andthe sheet registering mechanism is as follows: A sheet I5 fed from thepile I6 by rollers I2 and I4, and 23, 24 and 2|, 22 to a position uponthe plate I1, is initially located thereon by the stop member 26. Thecam 44 now actuates the valve 42 to apply a suction to the sheet I5 tofirmly hold it against the plate I1, and the cam 31 actuates the frame35 to raise the pressure rollers 34 from the sheet I5. The cam I55 nowcloses the switches I52, I53 and I54, placing the cells I38-I44inclusive in operative condition in respect to the relays I48, I49 andI5I. Should the sheet I5 be out of register, the change in the ratio ofthe light reflected by the edge of the printed impression, to the lightreflected from the unprinted margin space, will affect at least one ofthe photo-cells, which in turn will actuate its relay switch andenergize one of the solenoids 83, 84, 89, 9|, H9 or I2I to cause therotation in the proper direction of the proper threaded rod 49, 5| or 52and shift the sheet I5 through shifting of the plate I1 and thusregister the printed impression with the trimming means I9, 32. When thesheet is in register the light received by each photo-cell and its mateis in balance and the relays I48, I49 and I5I remain in normal positionand the rods 49, 5| and 52 are at rest. If the sheet is out of registerboth laterally and longitudinally, two of the photo-cells will beaffected simultaneously and both of the corresponding correctingmechanisms will operate together.

After a suitable interval of time allowed for sheet registering actionhas elapsed, the cam I55 opens the switches I52, I53 and I54, and thecam 38 allows the frame 33 to be lowered to trim the sheet. After thesheet I5 is trimmed, the cam 38 raises the frame 33, the cam 44 closesthe valve 42 to shut off the suction and free the sheet I5 from theplate I1, the cam 31 lowers the frame 35 to dispose the pressure rollers34 into cooperating relation with the feed rollers 2|, 22, 23 and 24,and the cam 36 lowers the stop member 26 to permit the trimmed sheet I5to be fed from the plate I1 to be picked up by the rollers 21 and 28 andfed to the delivery 29. Before the next cycle of the above operationsstarts, the plate I1 is preferably brought back into substantially acentral position before another sheet I5 is fed thereto, by closing theswitches I52, I53 and I54 by proper timing of the cam I55 to connect thecells I38-I44 with the respective relays |48-I5I.

Marks, indicated by dotted lines I (Figure 3) on the plate I1 affect thecells to cause such adjustment of the plate I1.

As hereinbefore stated, separate reversible motors may be used in placeof the clutch arrangement shown in Figure 3 to rotate the rods 49, 5|and 52 through the shafts 54, 55 and 56. Figure 14, in which similarityto the upper portion of Figure 3 will be noticed, illustrates the use ofa separate reversible motor 62a for rotating the rod 49 through theshaft 54, and it will be understood that the rods SI and 52 of Figure 3may be rotated in like manner through shafts 55 and 56, each connectedto another motor like 620.. In this arrangement, the solenoids 83 andB4, instead of actuating the clutch mechanism of Figure 3, actuate amotor reversing switch 58, and thus the rods 49, 5| or 52 may be rotatedin either direction under the control of the respective photo-electriccells I38I39, I4|-I42 and I43-I44 through the instrumentality of therespective sol- In Figure 14, the solenoids 83 and 84 are arranged to beoperated by the respective photoelectric cells |38I39 through conductorsI65I66 in the same manner as shown in Figure 7. In this instance,slidable plungers 8| and 82 are operably connected to a bar 18 insteadof the portion 18 of the sleeve shifting fork 13. The bar 18 is pivotedat 16' and connected at to the motor reversing switch 50, so swingingmovement of the bar 18 will operate the reversing switch in the wellknown manner and cause the motor 62' to rotate the rod 49 through theshaft 54 in the direction required to properly move the plate I1 toregister a sheet I5. An extension I21 may be provided on the bar 18 toactuate a brake, as in the previously described form.

The circuit to the field of the motor as shown in Figure 14, may betraced from LI through conductors I82 and I82a, through the motor fieldF and thence through conductor I83 to L2. Rotation of the shaft 49 inone direction will result when the solenoid 83 is energized, for thereversing switch 58 will be moved to bridge the contacts I84 and I85,thereby establishing a circuit from LI through conductor I82, contactsI84, conductor I86, armature of motor 62a, and thence through conductorsI81 and I81a, contacts I85, conductors I83a and I83 to line L2. Rotationof the shaft 49 in the opposite direction results, when the solenoid 84is energized, for the reversing switch will then be moved in theopposite direction to bridge contacts I88 and I89, thus establishing acircuit from LI through conductor I82, contacts I88, conductors H311;and I81 to the armature of motor 62a, then passing through the armaturein the reverse direction from that we viously described, and throughconductors I86 and I86a, contacts I89, and conductors |83a and I83 toline L2.

Referring now to the form of sheet registering mechanism shown inFigures 8-11 inclusive, the sheet I5 is fed as above described intoposition over a hollow plate I9I having perforations I92 through itsupper wall I93, whereby suction may be used to hold the sheet I5thereagainst. The plate I9I is supported by balls I in boxes 280 mountedupon the upper edge surfaces of a stationary frame I94 carrying in thisinstance, the lower sheet trimming knives I95. The upper knives I96 maybe secured to a swinging cam operated frame 33' as in the previous form.The photo-cells I38-I44 inclusive (Figure 12), and the light sourcesI45, I46 and I41 are used with this form of mechanism, and the cells areconnected to the polarized relays I48, I49 and I5I in the same manner(see Figure 11) In the form of the invention previously described, aseparate cam operated sheet stop 26 was provided, but in this form,sheet stops 26 are secured to the left hand knife I96 (Figures 8 and8A), to swing therewith. The arrangement is such that the cam 38provided to lower and raise the knife frame 33 has a camming surface 38awhich permits the frame 33' to be held at an intermediate elevation topresent the stops 26' in front of the forward edge of the moving sheetwhile holding the knives separated sufficiently to allow a sheet to passbetween them (see dotted lines in Figure 8A). The camming surface 38a isdisposed ahead of the camming surface 38b which latter surface acts topermit the knives to lower to trim the sheet. In this form, the shaft48' is III] driven in timed relation with the cams 250, 253 and 265 bybeing drivingly connected to the'shaft 253 by bevel gears 40a and 40b(Figure While in the form shown in Figures 1' to 7, the plate 1'1 wasadapted to be shifted in any direction in the same plane to register asheet by mechanical means actuated by solenoids controlled by thephoto-cells, in this form, the plate 191 is adapted to be shifted by acombination of magnetic and mechanical means. This combination includesa pair of catch lugs 191 and 198 formed integral with, or secured to,the underside of the plate 191 adjacent a side edge 199 and being spacedapart in the direction of the feed of the sheets 15. Another pair ofcatch lugs 201 and 202 identically formed and spaced apart, are disposedadjacent the other side edge 203 of the plate 191. Still another pair ofcatch lugs 204 and 205 are formed integral with or secured to theunderside of the plate 191, and are spaced apart transversely to thedirection of the feed of the sheets 15, and are disposed substantiallyon the medial line of the plate 191, between its opposite edges 206 and201. The catch lugs 191,201 and 198, 202 have their catch shoulders 208and 209 facing the opposite edges 205 and 20'! respectively of theplate, while the catch lugs 204 and 205 have their catch shoulders 2| 1and 212 facing the side edges 203 and 199 respectively of the plate 191.

Stop lugs 213 and 214 also formed integral with or secured to the plate191, depend from its underside and are spaced from the catch shoulders20B and 209 of the catch lugs 191, 201 and I 98, 202 respectively towardthe opposite plate edges 206 and 201. Other stop lugs 215 and 219,likewise formed integral with or secured to the plate 191, dependtherefrom and are spaced from the catch shoulders 211 and 212 toward theopposite plate edges 203 and 199 respectively of the plate 191. Catcharms 2" and 218, pivotally fastened to opposed swingable elongated arms219 and 221 respectively, extend outwardly therefrom toward the oppositeplate edges 206 and 20'! respectively and are adjacent the plate edge199. Catch members 222 and 223 on the free ends of the arms 211 and 218,are adapted to normally lie in engagement with the catch shoulders 208and 209 of the catch lugs 191 and 198 respectively by the upward urge ofspring pressed pins 224. The catch arms 21'! and 218 extend overelectromagnets 225 and 229 respectively, which are respectively carriedby and at the upper ends of the arms 219 and 221, and when energized,act upon the catch arms 21'! and 218 to pull them downwardly anddisengage the catch members 222 and 223 from the respective catchshoulders 208 and 209. The catch members 222 and 223 are disposedbetween the catch shoulders 208 and 209 and the stop lugs 213 and 214and'their outer ends are adapted to engage these stop lugs when theelongated arms 219 and 221 are swung outwardly by the cam 250, therebymoving the atfiacent end of the plate 191 to a central position betweenthe knives 195 acting on'theforward and rear edges of the sheet;

Catch arms 22'! and 228, pivotally fastened to opposed swingableelongated arm's 229 and 231 respectively (Figure 10), extend outwardlytherefrom toward the plate side edges 205 and*201 respectively and areadjacent the plate edge 203. Catch members 232 and 233 (Figure9)"on'tlre free ends of the arms 22'1'and 228, are adapted to normallylie in engagement with the catch shoulder .208 and 299 of the catchilugs201 and 2 02 respectively by the upward urge of spring presse'dpins'224;The catch arms 22! and 228 extend over electromagnets 234 and 235respectively, which are respectively carried by and at the upper ends ofthe arms 229 and 231, and when energized, act upon the catch arms 22!and 228 to pull them downwardly and disengage the catch members 232 and233 from the respective catch shoulders 208 and 209. The catch members232 and 233 are'disposed'between the catchshoulders 208 and 209, and thestop lugs 213 and 214 and their 'outerends are adapted to engage thesestop lug's when the elongated arms 229 and 231 are swung outwardly bythe cam 252, and similarly center the adjacent end of the plate 191.

"'Similar catch arms 236 and 231 pivotally fasten'ed to'opposedswingable elongated arms 238 arld239 respectively extend outwardlytherefrom toward the plate side edges 203 and 199 respectively. Catchmembers 241 and 242 on the fr'eeends of the arms 239 and 231 are adaptedto 'ndr'inally lie in engagement with the catch shoulders '2'11'and 212of the catch lugs 204 and 205'respectively, by the upward urge of springpressed pins'243. The catch arms 236 and 23! it nd over electromagnets244 and 24s respectively, which are carried by and at the upper endsof'the arins 238 and'239, and when the magnets ai'eenergized, they actupon'th'e catch arms 236a11d 231 to pull themdownwardly and disenga'gethe catch members 241 and 242' from the re- 's'pective catch shoulders211 and 212, in a manner' similar to the action of the magnets carriedby the arms 2I9 22I, and 229-231. The catch members 241 and 242' aredisposed between the catch shoulders 21 1 and 212 and the stop lugs 215and 219, and their outer ends are adapted to engage these stop lugs whenthe elongated arms 238 and 239 are swung outward by the cam 256 therebymoving the plate 191 to a central position between 'the knives that cutthe side edges of the sheet.

.The elongated arms 219 and 221 extend downwardlyand are pivoted to astationary bracket 246; and the elongated arms 229 and 231 are similarlyarranged and extend downwardly and are 'pivotedto a' stationary bracket241. The elongated'arms 238 and 239 extend downwardly and are pivoted tostationary brackets 248 and 249 respectively. A compression spring 251(Figure 8)"is provided adjacent the upper end of each 'of the elongatedarms 2'19, 221, 229 and 231, and are arranged to react between therespective arm and the stationary frame 194 to constantly urge theopposed arms 2I9,' 221', and 229, 231 toward each other. Cams 250 and252 are secured to a cro ss' shaft 253, and are'disposd respectivelybetween" each pair' of opposed arms 219, 221, and 229 231 'to' beengaged by a roller 254 mounted on each of the arms. A compressionspring 255 (Figure 9) is provided adjacent the upper end of each of theelongated arms 238 and 239 to constantly urge them toward each other. Acam 255 mane 10) secured preferably on the output shaft 258 of acombined electric motor and reducing gear 251 is disposed between theopposed elongated arms 2'38 and 239 to be engaged by a roller 259mounted on each of the arms. The output shaft 258 has a bevel gear 261secured thereto which is in mesh with-abevel gear 292 secured onthe'cross shaft 253.

A cam 263 secured on the shaft 253 is formed to engage and actuate avalve 254 which controls the suction for the plate 191, whereby the 1 11 '5 1 9 Q P 1 3 15 p termined Examiner 2'52 and 256 under urge of thesprings I and Rotation of the cams 256, 252 and 256 will cause movementof the elongated arms 2I9-22I, 229-23I and 238-239 as the cams arerotated from a position where a roller 254 or 259 is engaged by a highportion of the cam, to a position where a low portion of the cam isopposite the roller. After the energization (by action of thephoto-cells), of either or both magnets of each of the three pairs ofelectromagnets carried by the elongated arms, and the consequentwithdrawal of their catch members from engagement with the cooperatingcatch lug, movement of any elongated arm carrying a released catchmember, as such arm is moved toward the center of the cam, will have noeffect on the plate I9I, but if any catch member is in engagement with acatch lug on the plate, when the elongated arm carrying it is movedinward, the plate will be moved in the same direction, the motion beingcontinued until it is stopped by energization of the electromagnetcarried by that arm, which action occurs when proper registration of thesheet affects a pair of photo-cells, and through their relay, energizesthe electromagnet.

The cells I38, I39, I4I, I43 and I44 (Figure 12) with their associatedlight sources I45, I46 and I41, and the polarized relays I48, I49 andI5I (Figure 11) are adapted for use, as in the previously described formof registering mechanism, for selecting the desired electromagnet ofthis mechanism to be energized, to obtain the proper movement of theplate I9I to register the sheet I5 with the printed impression thereon.The electric circuit for this form of registering mechanism whereinelectromagnets are used, is also schematically shown and it will beobserved that the circuit for the light sources I45, I46 and I41, andthe circuits and connections between the cells I38-I44 inclusive, andthe respective relays I48, I49 and I5I are very similar to those of thepreviously described form, but with the following difierences. The camoperated switches I52, I53 and I54 of the first form have been replacedby the cam operated switches 266, 261 and 268, and that the cam I55 foractuating these switches has been replaced by the cam 265.

The electric circuits from the relays I48, I49 and I5I of theelectromagnets are different from those used in the previous form to theclutch actuating solenoids, due to the addition in this latter form, ofmagnetic means to hold the plate I9I in its adjusted sheet registeredposition. This magnetic plate holding means includes electromagnets 21I,212 and 213 respectively disposed along the transverse axis of the plateI9I, one adjacent the side edge I99, another adjacent the side edge 263,and the other at the center. The electromagnets 21I, 212 and 213 aresupported directly beneath the plate I9I by cross bars 214, 215 and 216respectively. The arrangement is such that when the registering controlelectromagnets are not energized, the plate holding magnets areenergized; this being efiected by the closing of a switch 269 by the cam265, and the switches 294, 295 and 296 which are closed by the coils284, 285 and 286 respectively, which are in turn energized by circuitsthrough the normally closed switches of relays I48, I49 and I5I.

The switch 269 controlled by the cam 265 is connected by a conductor 281to the line wire LI and by a conductor 288 to a common conductor 289 towhich normally open switches 294, 295 and 296 are connected byconductors 29I, 292 and 293 respectively, these switches being connectedby conductors 291, 298 and 299 to the plate holding magnets 21I, 212 and213; each of which are connected to the line wire L2 by a conductor 36I.Normally closed switches 362, 363 and 364 are each connected to the linewire L2 by a conductor 365 and are respectively connected to oneterminal of the plate shifting magnets 225, 226, 234, 235 and 244, 245by conductors 366, 361 and 368. The opposite terminals of the plateshifting magnets are respectively connected by conductors 369, 3, 3I2,3I3, 3I4 and 3I5 to one terminal of each of the normally open switches3I6,

' 3I1, 3I8, 3I9, 32I and 322 which in pairs are such as the trimmingknives.

under the control of the relays I49, I46 and I5I respectively. The otherterminal of the switches 3I6 and 3H at the relay I49, are connectedtogether by a conductor 323, and to the common conductor 289 by aconductor 324. The other terminal of the switches 3I8 and 3I9 at therelay I48, are connected together by a conductor 325, and to the commonconductor 269 by a conductor 326. The opposite terminals of the switches32I and 322 at the relay I5I, are connected together by a conductor 321and to the common conductor 289 by a conductor 328.

One terminal of each of the normally closed switches 211 and 218 at therelay I48 is connected by a conductor 329 to the other. One terminal ofeach of the normally closed switches 219 and 28I at the relay I49 issimilarly connected by a conductor 33I. One terminal of each of thenormally closed switches 282 and 283 at the relay I5I, is similarlyconnected by a conductor 332. The other terminals of the switches 211,219 and 282 are connected by a conductor 333 to the common conductor289, and the other terminals of the switches 218, 28I and 283 areconnected by a conductor 334 to the respective coil 284, 285 and 286,each of said coils being connected by a conductor 335 to the line wireL2. As in the previously described form, the plate I9I is centralizedduring the interval a trimmed sheet I5 is being removed and another fedto the plate I9I. This is accomplished by the action of the outer endsof the respective catch arms upon the stop lugs adjacent thereto. Thus,as soon as the switches 266-269 are opened by the cam 265, the catcharms snap away from the respective electromagnets. and due to themovement given them by the respective cams 256, 252 and 256 through therespective elongated arms, engage the stop lugs to centralize the plateI9 I.

By means of the above described electrical control circuit, the form ofsheet registering mechanism shown in Figs. 8-11 inclusive, will operateto efficiently register the printed impressions upon a sheet with themeans to operate thereon,

As in the previously described form, the photo-cells when affected byimproper register of impressions, will effect energization of one ormore of the registering control magnets, but in the form presently underconsideration, one or more of the catch arms 2I1 or 2I8, 221 or 228, and236 or 231 will be energized, thereby allowing the other catch arm ofthe pair to move the plate to the extent necessary to effectregistration, when the catch arms are moved by the movement of theelongated arms under influence of the springs 25I or 255. When the platehas been moved to the extent necessary to bring the sheet into theproper registration, the catch arm that has been engaged to move theplate will be attracted by its magnet, stopping movement of the plate atthe proper position.

Due to the interlocking switches actuated by the coils 284, 285 and 286under the control of the switches 211-218, 219-28I, 282-283, only theplate holding magnet 21I, 212 or 213 associated with the particularregistering control magnet energized will be deenergized to permitshifting of the plate I9I. Rollers 336, 331- and 338 (Figure 9)journaled in each of the plate holding magnets 21I, 212 and 213respectively, lightly engage the plate I3I when these magnets aredeenergized, whereby no drag upon the plate I9I will be experienced whenshifting action is taking place at the released point, but when theholding magnets are energized these rollers grip the plate and inconjunction with other portions of the magnets, hold it securely.

Briefly the operation of the latter form of sheet registering mechanismis as follows, assuming that a sheet I5 has been initially disposed uponthe plate HI and the cam 263 has opened the valve 264 to secure thesheet I5 to the plate I9I by suction. At this point in the operation ofthe mechanism, the cam 285 closes the switches 286-269 inclusive so thatthe coils 284, 285 and 286 are energized to open the switches 302, 303and 304, and to close the switches 294, 295 and 295, whereby the plateholding magnets 21I, 212 and 213 are energized and are acting on theplate I9I to hold it in position and down upon the respective rollers336, 331 and 338.

The switches 266, 261 and 268 being closed, the circuits of the cellsI38-I44 inclusive are completed to the respective relays I48, I49 andI5I. Now should one or more of the cells be affected due to the sheet I5being out of register with a printed impression thereon, for instancethe cell I38, the relay I48 will be actuated to open the switch 211 andclose the switch 3I8. Opening of the switch 211 will deenergize the coil264 whereupon the switch 295 will open and the switch 303 will close.Opening of the switch 295 will deenergize the plate holding magnet 212to release the plate at this point. Closing of the switches 3I8 and theswitch 303 will energize the registering magnet 234 and pull the catcharm 221 downwardly to release it from the catch lug 20I. The highportions of the cams 250, 252 and 256 now rotate beyond the rollers 254and 259 that are carried by the respective elongated arms 2 I 9-22 I,22923I and 238239, and the arms are moved inward by the respectivesprings 25I and 255. The catch arm 228 being in engagement with thecatch lug 202, the inward movement of the arm 228 will move the plateI9I toward the left as seen in Figures 8 and 9, the motion beingcontinued until the point of proper registration is reached, at whichtime the action of the cells I38 and I39 will balance, deenergizing therelay I48 and thereby closing the switch 211 and opening the switch 3I8,which in turn will energize the coil 284 closing the switch 295 toenergize the plate holding magnet 212. vA similar action will take placewhenever any one of the cells I38-I44 inclusive are affected by the edgeof the printing impression being out of register with the cutting knivesor other means operating upon the sheet I5. Thus the mechanism isadapted to move the sheet I5 through the instrumentality of the plate I!in any direction in the plane of its surface.

In instances where a sheet 34I (Figure 12), having printed impressions355 thereon is to be provided with perforations, marks, or indentations356 which outline the impressions by being formed in the sheet 34I invertically and horizontally disposed rows between the impressionsthereon, as in the case of sheets of perforated postage stamps, it isdesirable to include a sheet registering mechanism in the structure of amachine adapted to so perforate it. Such a combination is shown inFigure 13 wherein the sheets 34I are suitably fed from a pile 342 bydriven rollers 343 and 344 and cooperating pressure rollers 345 and 346respectively, into an initial position over a plate I1 or I9I of thedesired registering mechanism described above. The registering mechanismselected then operates to register the printed impressions on the sheet34I with timed sheet feeding or transfer means, in a manner asdescribed, and the sheet 34I is then released and picked from the plateI1 or I9I by grippers 341 carried on an accurately timed transfer chain348 and by it transferred to cooperating sheet perforating cylinders 349and 35I whereby the sheet 34I is perforated, or impressed transverselyof the direction of its travel. From the cylinders 349 and 35I, thesheet 34I is transferred by further movement of the timed transfer chain348 to which it is secured by grippers 341 to cooperating sheetperforating cylinders 352 and 353 whereby the sheet is perforated, orthe like, in the same direction as it is moving and perpendicular to thefirst perforations. From the cylinders 352 and 353, the sheet isdelivered to a pile 354.

It will be understood that the invention may be embodied in otherspecific forms without departing from the spirit or essential attributesthereof, and it is therefore desired that the present embodiments beconsidered in all respects as illustrative and not restrictive, and itwill be further understood that each and every novel feature andcombination present in or posessed by the mechanism herein disclosedforms a part of the invention included in this application.

What I claim is:

1. In a machine having means for operating on printed sheets in registerwith the printed impressions thereon, a sheet support, a plurality ofphoto-electric cells positioned to detect improper register of theprinted impressions on a sheet deposited on the support, with respect tothe said means, and electrically actuated means controlled by thephoto-electric cells for moving the sheet in the plane of its surface inany direction as required to bring the printed impressions into registerwith the operating means.

2. In a machine having means to operate on printed sheets, a sheetholder, means to move the sheet holder to shift the sheet in anydirection in the plane of its surface when on the holder, and means todetect improper register of the printed impressions on the sheet inrespect to the operating means and to control the actuation of the sheetholder moving means, to register the printed impressions on the sheet onthe holder with the operating means.

3. In a machine having means to operate on printed sheets to provide auniform border about printed impressions thereon, a sheet holder movablein any direction in the plane of the surface of the sheet held thereby,means to move the sheet holder, and means to detect improper register ofthe printed impressions on the sheet in respect to the operating meansand to control the actuation of the sheet holder moving means toregister the printed impressions with the operating means.

4. In a machine for trimming printed sheets, cutting mechanism adaptedto trim a plurality of the edges of a sheet in register with printedimpressions thereon, a sheet support, a plurality of photo-electriccells positioned to detect improper register of the said impressions ona sheet deposited on the support with respect to the cutting mechanism,and means controlled by the photo-electric cells for moving the holderto shift the sheet in the plane of its surface in any direction asrequired to bring the printed impressions into register with the cuttingmechanism.

5. In a machine having means for operating on a printed sheet to providea uniform border about printed impressions thereon, a sheet supportmovable in any direction in the plane of the sheet supported thereby, aplurality of detecting devices positioned to detect improper register ofthe printed impressions on the sheet with the operating means, and meanscontrolled by said detecting devices for moving the sheet support toshift the sheet to register the printed impressions thereon, with theoperating means.

6. In mechanism for registering impressions printed on a sheet with anoperable device for operating upon the sheet to provide a uniform borderabout the printed impressions thereon, a sheet support movable in anydirection to shift the sheet supported thereby in the plane of itssurface, means to so move the sheet support, and a plurality ofphoto-electric devices positioned to detect improper register of theprinted impressions, with the device for operating on the sheet, and tocontrol the actuation of the sheet support moving means.

7. In mechanism for registering impressions printed on a sheet with anoperable device for operating upon the sheet to provide a uniform borderabout the printed impressions thereon, a sheet support movable in anydirection to shift the sheet supported thereby, in the plane of itssurface, means to so move the sheet support, releasable means to holdthe sheet support at the position into which it is moved, and aplurality of photo-electric cells positioned to detect improper registerof the printed impressions, with the device for operating on the sheet,and to control the actuation of the sheet support moving means.

8. In mechanism for registering impressions printed on a sheet, with anoperable device for operating upon the sheet to provide a uniform borderabout the printed impressions, a sheet support movable in any directionto shift the sheet supported thereby in the plane of its surface, meansto so move the sheet support, releasable means to hold the sheet supportat the position into which it is moved, a plurality of ph'otoelectriccells positioned to detect improper register of the printed impressions,with the device for operating on the sheets and to control the actuationof the sheet support moving means, and electrically operable meanscontrolled by the photo-electric cells to release the sheet supportholding means.

9. In combination with means to operate upon a sheet, mechanism forregistering printed impressions on a sheet with the means to operateupon the sheet, a sheet supporting member movable in any direction in asingle plane, means to so move the said member, and means affected bythe position of the printed impressions on the sheet, in respect to themeans to operate upon the sheets, in control of the member moving means.

10. In combination with means to operate upon a sheet, mechanism forregistering impressions printed on a sheet, with the means to operateupon the sheet, a sheet supporting member movable in any direction inone plane, the said member moving means and the control means thereforbeing operable when a sheet is removed from the member, to effectmovement of the member back into its initial position to receive anothersheet, and means affected by the position of the printed impressions onthe sheet, in respect to the means to operate upon the sheets, incontrol of the member moving means.

11. In combination with means to operate successively upon a pluralityof sheets, mechanism for registering impressions printed on a sheet withthe means to operate upon the sheets, a sheet supporting member movablein any direction in one plane, means to so move the said member, meansoperable when a sheet is moved away from the member to efiect movementof the member back into its initial position to receive another sheet,and means affected by the position of the printed impressions on eachsheet, in

w respect to the means to operate upon the sheet,

in control of the member moving means.

12. In combination with means to operate successively upon a pluralityof sheets, mechanism for registering impressions printed on a sheet withthe means to operate upon the sheets, a freely supported sheet holdingplate, means to move the plate in any direction in one plane only, meansadjacent opposite edges of the plate adapted to be engaged by the platemoving means to move the plate generally in one direction, means ad-J'acent the center of the plate adapted to be engaged by the platemoving means to move the plate generally in a direction perpendicular tothe first mentioned movement, and means affected 1 by the impressionsprinted on the sheet, to selectively actuate the plate moving means.

13. In combination with means to operate successively upon a pluralityof sheets, mechanism for registering impressions printed on a sheet,

'' with the means to operate upon the sheets, a

freely supported sheet holding plate, means to move the plate in anydirection in a single plane, means adjacent opposite edges of the plateadapted to be engaged by plate moving means to move the plate generallyin one direction, means adjacent the center of the plate adapted to beengaged by plate moving means to move the plate generally in a directionperpendicular to the first mentioned movement, means operable when asheet is removed from said plate to efiect movement thereof back intoits initial position to receive another sheet, and means affected by theimpressions printed on the sheet to selectively actuate the plate movingmeans.

14. In combination with means to operate upon a sheet, mechanism forregistering impressions printed on a sheet, with the means to operateupon the sheet, a freely supported sheet holding plate, means to movethe plate in any direction in a substantially horizontal plane, meansadiacent opposite edges of the plate adapted to be engaged by platemoving means to move the plate generally in one direction, meansadjacent the center of the plate adapted to be engaged by plate movingmeans to move the plate generally in a direction perpendicular to thefirst mentioned movement, means affected by the printed impressions onthe sheet, to selectively actuate the plate moving means, and marks onthe plate adapted to be affected by the actuating means to cause it toactuate the plate moving means to substantially centralize the platewhen a sheet is removed therefrom.

15. In combination with means to operate upon a sheet, mechanism forregistering impressions printed on a sheet, with the means to operateupon the sheet, a sheet supporting member movable in any direction in asubstantially horizontal plane, means to so move the said member, andmeans afiected by the position of the printed impressions on the sheet,in respect to the means to operate upon the sheet, in control of themember moving means, and releasable means to hold the sheet supportingmember in the position to which it is moved, while the operating meansis being actuated.

19. In a trimming machine for sheets having impressions printed thereon,a plurality of cut ting knives, a sheet feeding mechanism having meansto advance a sheet to a sheet support freely movable in all directions,a stop to limit the motion of the sheet, a plurality of means to movethe sheet support and to hold it in position, means for holding thesheet on the support, a plurality of photo-electric cells affected by aplurality of impressions on the sheet and acting on the support movingmeans to position the support with each impresion in a desired position,means to actuate the cutting knives,means to remove the stop from thepath of the sheet, and means to forward the sheetto a delivery, all ofsaid means heing directly connected to and operated by the 16. Incombination with means to operate upon a sheet, mechanism forregistering impressions printed on a sheet, with the means to operateupon the sheet, a freely supported sheet holding plate, means to movethe plate in any direction in a substantially horizontal plane, meansadjacent. opposite edges of the plate, adapted to be engaged by theplate moving means to move the plate generally forwardly and backward,means adjacent the center of the plate adapted to be engaged by platemoving means to move the plate generally in a direction perpendicular tothe first mentioned movement, mean affected by the printed impressionson the sheet to selectively actuate said plate moving means, andreleasable means to hold the plate in the position into which it ismoved while said operating means is being actuated.

1'7. In a mechanism for positioning a sheet having impressions thereonthat is to be cut in a precise relation with the impressions, a supportfor the sheet freely movable in a substantially horizontal plane, meansfor moving opposite sides of the support forward and backward, means tomove the support bodily in a line substantially perpendicular to theedges of the said sides of the support, and photo-electric meansdisposed to be afiected by a plurality of spaced apart impressionsprinted on the sheet, and adapted to control the operation of the saidplate moving means to so position the plate, that the sheet thereon willbe out in the desired precise relation with the impressions.

18. In a mechanism for positioning a sheet having impressions thereonthat is to be cut in-a precise relation with the impressions, a sheetsupport freely movable in a substantially horizontal plane, means formoving opposite sides of the support forward and backward, means to movethe plate bodily in a line substantially perpendicular to the edges ofthe said sides of the support, and photo-electric means disposed to beaffected by a plurality of spaced apart impressions printed on thesheet, and adapted to control the operation of the said plate movingmeans to move the plate bodily in any horizontal direction and to swingit as may be necessary to so position the plate that the sheet thereonwill be cut in the desired precise relation with the impressions.

machine.

20. In a machine having means for operating on sheets, a sheet support,a plurality of photoelectric cells positioned to detect improperregister of printed impressions on a sheet held on the support withrespect to the said means, and motor operated means controlled by thephoto-electric cells for moving the support longitudinally andtransversely in a horizontal plane as required to bring the printedimpressions into register with the operating means.

21. In a machine having means for operating on sheets, a sheet support,a plurality of photoelectric ells positioned to detect improper registerof printed impressions on a sheet held on the support with respect tothe said means, electrically operated means controlled by thephotoelectric cells and actuated when necessary to move the supportlongitudinally and transversely in a horizontal plane as required tobring the printed impressions into register with the operating means.

22. In a machine having means for operating on sheets, a sheet support,a plurality of photoelectri cells positioned to detect improper registerof printed impressions on a sheet held on the support with respect tothe said means, and cam operated means controlled by the photo-electriccells and actuated when necessary to move the support longitudinally andtransversely in a horizontal plane as required to bring the printedimpressions into register with the operating means.

23. In a machine having means for trimming printed sheets, a sheetsupport on which a printed sheet is held, a plurality of photo-electriccells positioned to detect improper register of impressions on theprinted sheet, with respect to the trimming means, and a plurality ofmeans operably controlled by the photo-electric cells for moving thesupport longitudinally and transversely in a horizontal plane asrequired to bring the printed impressions into register with thetrimming means.

24. In a machine having means to successively cut a plurality of sheetseach having a similar device whereby it may be registered, a sheetholder, means to move the sheet holder and a sheet thereon, to shift thesheet in any direction in the plane of its surface, and means to detectimproper register of the device of each sheet, in respect to the cuttingmeans, and when improper register exists, to control the actuation ofthe sheet holder moving means to move the device of the sheet intoproper register,- whereby a plurality of sheets may be successively cutin the same relation to their registering devices.

WILLIAM F. HUCK.

